Service bulletins for the 2019 Audi A4
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
859 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| A8023122062583_2 | 2023-02-07. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This bulletin provides instructions for when the customer advises that there is insufficient or uneven cabin heating from the HVAC system. |
|---|---|
| A7023782044503_4 | 2023-02-07. Service bulletin. STRUCTURE. This bulletin provides instructions for when a customer hears a rattling noise coming from the rear parcel shelf or rear subwoofer grille when playing music. |
| A6023612063187_2 | 2023-02-07. Service bulletin. VISIBILITY:SUN/MOON ROOF ASSEMBLY. This bulletin provides instructions for when a customer reports concerns with the sunroof opening permeter seal is generating noise, dripping water, or if the seal is distorted and/or not flush with the roof panel. |
| A5123262068999_1 | 2023-02-07. Service bulletin. STRUCTURE. This bulletin provides instruction for when a customer advises that a visible line of corrosion is forming in the roof. |
| A4623402069078_1 | 2023-02-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for when the zirconium inserts found to be not firmly attached during service work. |
| DC_Alternator | 2023-01-06. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. Support for Customers Affected by Alternator Back-order |
| DC_RECALLS | 2023-01-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SAFETY RECALLS, COMPLIANCE RECALLS and STOP SALES |
| A572200202203210 | 2023-01-06. Service bulletin. LATCHES/LOCKS/LINKAGES:DOORS:LOCK. This technical service bulletin provides troubleshooting information for the vehicle locking system. |
| A3022312053597_6 | 2023-01-06. Service bulletin. POWER TRAIN. This bulletin contains repair instructions for when there is a leak from the lower bellhousing. |
| A9722892061976_3 | 2022-12-06. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains guidance for submitting warranty wiring repairs. |
| A9122472062466_3 | 2022-12-06. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This bulletin describes the ways in which a variety of Audi vehicles connect to Apple Wireless CarPlay, and the methods to troubleshoot connection concerns. |
| A9122452068435_1 | 2022-12-06. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT:BLUETOOTH/WIFI. This bulletin states that due to a software malfunction in Apple iOS Version 16.0.x there are restrictions with bluetooth connection. |
| A9122442062973_3 | 2022-12-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin states that an SOS malfunction accompanied by DTCs U142100, U164200, and/or U122C100 my be stored erroneously and the ETCs should be cleared. |
| A3922492059057_5 | 2022-12-06. Service bulletin. WHEELS. This bulletin contains repair instructions for noises when in reverse or vibrations/humming/droning or rubbing when fully turning the wheel. |
| A9722882068037_2 | 2022-11-04. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin provides instructions on how to address DTC U014000, or DTC U110100. |
| A912231205594512 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains repair instructions for when the warning message "SOS Emergency call function deactivated" is seen in the instrument cluster. |
| A912230205607616 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin contains instructions for when there is no diagnostics communication with the ConBox. |
| A9122332062973_2 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin states that an SOS malfunction accompanied by DTCs U142100, U164200, and/or U122C100 my be stored erroneously and the ETCs should be cleared. |
| A9122292062480_2 | 2022-10-05. Service bulletin. EQUIPMENT:ELECTRICAL. This bulletin advises that DTCs B18BEF0 and/or B18BDF0 may arise due to a sensitive diagnostic routine; codes can be cleared and no parts require replacement. |
| A9722872068037_1 | 2022-10-05. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This bulletin provides instructions on how to address DTC U014000, or DTC U110100. |
| A912226205594511 | 2022-10-05. Service bulletin. COMMUNICATION:MANUFACTURER TELEMATICS. This bulletin contains repair instructions for when the warning message "SOS Emergency call function deactivated" is seen in the instrument cluster. |
| A912225205607615 | 2022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for when there is no diagnostics communication with the ConBox. |
| A2422602067937_1 | 2022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin offers further guidance regarding diagnosis and system information for vehicles with a 48 V electrical system. |
| A1722202067906_1 | 2022-10-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides detailed instructions for diagnosis when DTC P0A7D00 is present. |
| A0022582045316_6 | 2022-09-01. Service bulletin. ELECTRICAL SYSTEM:IGNITION. This bulletin contains information for diagnosing the Start/Stop system. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.